CN204834296U

CN204834296U - Group power transformer that couple more

Info

Publication number: CN204834296U
Application number: CN201520633527.8U
Authority: CN
Inventors: 马少永; 赵松; 柳慧茹; 张安军; 聂华岭; 徐丽萍; 郭菲菲
Original assignee: SHANDONG TAIKAI TBEA Co Ltd
Current assignee: SHANDONG TAIKAI TBEA Co Ltd
Priority date: 2015-08-21
Filing date: 2015-08-21
Publication date: 2015-12-02
Anticipated expiration: 2025-08-21

Abstract

The utility model discloses a group power transformer that couple more, including iron core, primary side winding, the vice limit winding of suit on the iron core, wherein pair limit winding divide into first winding, secondary winding, the tertiary winding, and is parallelly connected through the change over switch messenger's secondary winding and the tertiary winding, and then establishes ties with first winding, and the head and the tail of primary side winding, vice limit winding pass through the outside hookup, realizes that yy0, yy2, yy4, yy6, yy8, yy10 couple the group, through the series parallel transition switch, make the secondary winding and the tertiary winding establish ties, and then establish ties with first winding, the head and the tail of primary side winding, vice limit winding realize through outside hookup that yd1, yd3, yd5, yd7, yd9, yd11 couple the group. The utility model has the characteristics of simple structure is suitable for, performance safe and reliable, and it is convenient to maintain, and the practicality is strong.

Description

A kind of many connecting group grade power transformer

Technical field

The utility model relates to a kind of power transformer.

Background technology

In electric power system and in productive life, transformer application widely, due to the requirement of load, sometimes need two transformers connected in parallel to run, require the connecting group grade of two transformers and phase place consistent, particularly in the through supply line of railway self-closing, when adjacent switchgear house is not same electric power system, phase angle is inconsistent, is difficult to the requirement reaching parallel running, if it is inconvenient to change transformer, cost is high.

Summary of the invention

The purpose of this utility model there is provided a kind of many connecting group grade power transformer, and for reaching the object of many connecting group grade, its technical scheme taked is:

This transformer comprises iron core, is sleeved on former limit winding on iron core and vice-side winding successively, vice-side winding is made up of the first winding, the second winding and the tertiary winding be set on every phase iron core stem stem, makes the second winding and the tertiary winding be in parallel connection or series connection by regulating change over switch; When the second winding and tertiary winding parallel connection, during again with the first windings in series, the binding post short circuit of the x, y, z of vice-side winding, the binding post of a, b, c accesses load corresponding binding post a, b, c or c, a, b or b, c, a, Yy0, Yy4, Yy8 connecting group grade can be realized respectively, or the binding post short circuit of a, b, c of the secondary side of vice-side winding, the binding post of x, y, z accesses load corresponding binding post b, c, a or a, b, c or c, a, b, can realize Yy2, Yy6, Yy10 connecting group grade respectively; When the second winding and tertiary winding series connection, during again with the first windings in series, b and x, c and the y of vice-side winding, the binding post of a and z short circuit between two, the binding post of x, y, z accesses load corresponding binding post b, c, a or a, b, c or c, a, b, Yd1, Yd5, Yd9, connecting group grade can be realized respectively, or the binding post of a and the y of vice-side winding, b and z, c and x short circuit between two, a, b, c binding post access load corresponding binding post c, a, b or b, c, a or a, b, c, Yd3, Yd7, Yd11 connecting group grade can be realized respectively.

The utility model is when transformer primary secondary voltage is constant, change the connection of vice-side winding by change over switch and change the head and the tail connecting mode of former limit winding, vice-side winding, realize the adjustment of the many connecting group grade of Yy0, Yy2, Yy4, Yy6, Yy8, Yy10, Yd1, Yd3, Yd5, Yd7, Yd9, Yd11, meet the demand of power supply, decrease the overlapping investment of user to transformer, avoid the expense of transformer assembling and disassembling.The utility model is specially adapted to the through electric power system of railway self-closing, has structure simply applicable, and performance safety is reliable, feature easy to maintenance.

Accompanying drawing explanation

Fig. 1 is overall structure schematic diagram of the present utility model;

Fig. 2 is that vice-side winding when being in Yy0, Yy4, Yy8 connecting group grade connects schematic diagram;

Fig. 3 is that vice-side winding when being in Yy2, Yy6, Yy10 connecting group grade connects schematic diagram;

Fig. 4 is that vice-side winding when being in Yd3, Yd7, Yd11 connecting group grade connects schematic diagram;

Fig. 5 is that vice-side winding when being in Yd1, Yd5, Yd9 connecting group grade connects schematic diagram.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described further.

As shown in Figure 1, former limit winding 2 and vice-side winding 3 are sleeved on iron core 1 successively, vice-side winding 3 is made up of the first winding 5, second winding 6 be set on every phase iron core stem stem and the tertiary winding 7, makes the second winding 6 and the tertiary winding 7 be in parallel connection or series connection by regulating the regulating handle of change over switch 4.The Y connecting mode of former limit winding is constant, and first head A, B, C of former limit winding access the three phase mains of corresponding phase sequence, immobilize.

As shown in Figures 2 and 3, no-load tapping switch is in " and " position,

(1), during Yy0: the binding post short circuit of the x, y, z of vice-side winding, the binding post of a, b, c accesses load corresponding binding post a, b, c.

(2), during Yy2: the binding post short circuit of a, b, c of the secondary side of vice-side winding, the binding post of x, y, z accesses load corresponding binding post b, c, a.

(3), during Yy4: the binding post short circuit of the x, y, z of vice-side winding, the binding post of a, b, c accesses load corresponding binding post c, a, b.

(4), during Yy6: the binding post short circuit of a, b, c of vice-side winding, the binding post of x, y, z accesses load corresponding binding post a, b, c.

, Yy8 time: vice-side winding the binding post short circuit of x, y, z, binding post b, c, a that the binding post access load of a, b, c is corresponding.

(6), during Yy10: the binding post short circuit of a, b, c of vice-side winding, the binding post of x, y, z accesses load corresponding binding post c, a, b.

As shown in Figure 4 and Figure 5, no-load tapping switch is in " and " position,

, Yd1 time: vice-side winding b and x, c and y, a and z binding post short circuit between two, corresponding binding post b, c, a of binding post access load of x, y, z.

, Yd3 time: vice-side winding a and y, b and z, c and x binding post short circuit between two, a, b, c binding post access load corresponding binding post c, a, b.

, Yd5 time: b and x, c and the y of vice-side winding, the binding post of a and z short circuit between two, x, y, z binding post access load corresponding binding post a, b, c.

, Yd7 time: vice-side winding a and y, b and z, c and x binding post short circuit between two, a, b, c binding post access load corresponding binding post b, c, a.

, Yd9 time: vice-side winding b and x, c and y, a and z binding post short circuit between two, x, y, z binding post access load corresponding binding post c, a, b.

, Yd11 time: vice-side winding a and y, b and z, c and x binding post short circuit between two, a, b, c binding post access load corresponding binding post a, b, c.

Claims

1. connecting group grade power transformer more than a kind, comprise iron core (1), be sleeved on former limit winding (2) on iron core (1) and vice-side winding (3) successively, it is characterized in that: vice-side winding (3) is made up of the first winding (5) be set on every phase iron core stem stem, the second winding (6) and the tertiary winding (7), making the second winding (6) and the tertiary winding (7) be in parallel connection or series connection by regulating change over switch (4), when the second winding (6) and the tertiary winding (7) parallel connection, during again with the first winding (5) series connection, the x of vice-side winding (3), y, the binding post short circuit of z, a, b, the binding post of c accesses binding post a corresponding to load, b, c or c, a, b or b, c, a, Yy0 can be realized respectively, Yy4, Yy8 connecting group grade, or a of the secondary side of vice-side winding (3), b, the binding post short circuit of c, x, y, the binding post of z accesses binding post b corresponding to load, c, a or a, b, c or c, a, b, Yy2 can be realized respectively, Yy6, Yy10 connecting group grade, when the second winding (6) and the tertiary winding (7) series connection, during again with the first winding (5) series connection, b and the x of vice-side winding (3), c and y, the binding post short circuit between two of a and z, x, y, the binding post of z accesses binding post b corresponding to load, c, a or a, b, c or c, a, b, Yd1 can be realized respectively, Yd5, Yd9, connecting group grade, or a and the y of vice-side winding (3), b and z, the binding post short circuit between two of c and x, a, b, c binding post access load corresponding binding post c, a, b or b, c, a or a, b, c, Yd3 can be realized respectively, Yd7, Yd11 connecting group grade.